Strap adjustment device



FIG. 1 is a perspective view of a strap adjustment device showing the new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a back end elevational view thereof;

FIG. 5 is a front end elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof.

The broken line portions of the disclosure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a strap adjustment device, as shown and described. 